Tech Tips Newsletter
UE SOUND BITES . . . The Ultrasound Newsletter published by UE Systems, Inc.
Information… Product News… Advice… Dialog |
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T O P I C S
The Right Tool For the Job
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This newsletter is dedicated to you, the reader with the goal of improving your ultrasonic inspection skills and enhancing your value to your company or clients. As always, we welcome your participation. If you have questions or seek advice about your inspection techniques or programs, or if you wish to share your experiences with others, please e-mail your contributions to us at info@uesystems.com.
The Right Tool For the Job When someone tells you to take a screwdriver with you for a specific job, do you take just any or do you have to ask the type and size or if it will require an offset screwdriver? We all know screwdrivers are great tools to turn screws. But to do the job correctly we need to know the details before we walk out of the tool crib. The same concept is true for condition monitoring. Specifically before performing an inspection, it is advisable to visit the test area and walk around to determine what equipment you’ll need. One of the details to consider is whether the test subject will be accessible or not. Is the bearing housing covered? Are pipes close together or high up in the ceiling? Are cabinets locked? The details will help you prepare and make your inspection more efficient. While most ultrasonic testing can be performed with the standard modules: the contact and the scanning, there are applications where special modules will be needed. |
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For situations where leak detection is difficult due to pipe arrangements, such as when pipes are aligned too closely for the Ultraprobe to pass through, a new bendable scanning module can help. The “U-Bend” has a scanning transducer attached to a flexible tube that can be bent to odd, sometimes radical angles to help inspectors identify the exact location of a leak. The U-Bend is available for all the analog and digital Ultraprobe models. View the U-Bend Models: http://www.uesystems.com/prod_acc_U-Bend.asp
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Ultraprobe Tip: Sonic deflection can fool even the most experienced inspector at times. This is why it is important to incorporate a confirming method into your inspections. Some of these methods include: sealing the rubber probe end to the suspected leak site, scanning around the leak area 360 degrees(in all directions), using bubble solutions or using a note pad. The note pad is simple. Aim the probe at the leak site (close-up) and then move the note pad between the probe tip and the leak site. If the leak is there, every time the pad comes between the leak site and the probe end, the sound will drop off. Comments and Contributions: Some inspections involve hot test points or areas. As an example, some bearings run at high temperatures. At times this is due to the surrounding environment and, assuming the bearings have been selected for this environment, the heat can be “normal. But what about inspecting these bearings with ultrasound? Most often, the standard stethoscope (contact) probe will work since the time to listen to a bearing is often not very long. The same is true when testing steam traps. The test duration is usually not long enough to affect the readings. However for extreme cases, there is a solution, especially if the test points have to be monitored for a long period of time. We have a high temperature isolation device that allows the attachment of a fixed sensor such as the Ultratrak 750 to monitor the test subject. As an example, the Thermal Isolation Device will reduce a 300 degree C mounting point down to about 40 degrees C. Training Schedule: Training classes are once again filling up rapidly. Please be sure to register early since we limit the size of these classes to provide a better learning environment.
or register on-line: http://www.uesystems.com/forms.asp?frmID=10 More articles will be posted periodically. Please check back. If you do not wish to continue to receive this newsletter, please let us know via email. Contact us at info@uesystems.com. |
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